Stephen chester



PATENTED MAR.- 23, 1869.

S. 600. TI- CHESTER. TRIPPING MECHANICAL DETENTS.

'tion we desire to the arm,

not fiiaiai STEPHEN CHESTER, 'OF NEW YORK, N. Y., AND' CHARLES. T. CHES TER, OF ENGLEWOOD, NEW JERSEY. .Letters Patent No. 88,01(), dated March 23, 1869 amtedatedMa/rch 4, 1869 IMPROVEMENT IN {DRIPPING-MECHANICAL DETENI'S.

city,'con nty, and State of New York, and CHARLES T. CHESTER, of the village of Englewood, county of Bergen, and State of New Jersey, have invented a new and improved Mode of Tripping D'etents in Machinery;

Be it known that we, STEPHEN Gnnsrnn, of the and exact description of these improvements, reference being made tothc accompanying drawings, of which- Eigure 1 represents the complete machine, omitting or rod that carries the power to the desired place for using it; and.

, Figures 2, 3, 4, and 5, separate portions, in detail,

similar letters being usedto designate similar parts.

The object of our invention is to obtain, from the exertion, of a very small force, the liberation-of powerful mechanism, and we have illustratedone particular combination fora particular purpose, though the combinapatent is applicable also, generally, -to all machinery where a. small power is required to Our illustration represents the combination of the detent with an electromagnetic apparatus.

Where this power is to be exerted at agreat distance, it is well known that it is much reduced in effect. The friction that a common detent would occasion, where a large weight was employed to strike a heavy blow with a large hammer,- would make it necessary to employ a strong. force .t'o liberate it, so'that ipcourse has been had to the addition of falling ball, which,

descends, and, accubeing liberated by a small force,

- mulating force in its descent, finally strikes aheavyblow on the second detent, which liberates the machinery.

An appreciable time is occupied, in this arrangement,

for the'hammer to'acquire this force by its descent, so' that rapid, efi'ects cannot be produced where it is used. But, more particularly to describe the parts that compose our detent, and their relations to one'another, we refer to fig. 1. r The frame A supports a train; consisting of one wheel, 0, and one pinion, D, with its shaft F.

This shaft extends outside of the frame, and is firmly fastened to the arm G. i

This arm hasa projecting pin, '5; and this pin passes through one end of the rod V V, fig. 4; fi The other end of this rod engages with the arm W,

This arm projects from a rod, which terminates in a hammer, Y, and may be made to ring a hell, or perform any other required service.

Thus far the simple action of the machine is this: The weight driving thegmain wheel, which communicates motion'to the pinion, this pinion carrying a crankarm, (outside the frame) motion is given, through the pin 1 and the rod V V, in-the usual reciprocating direction. I t

We now-come .to our paiticular device for stopping and extended in Q. and we do hereby declare that the following is a; full in V-shaped catches.

and starting this action, and restoring the parts to their position of rest. i

' 'As an example of small force, we. use the fine wire magnet B, with its armature E, its lever T continued i It is evident that Q will vibrate fromlriglit to left, under a small magnetic influence, or by the pulling of a string,- or other-mechanical movement.

Q carries on its face two springs, m'm, terminating Small upright pins we", also attached tothe lever Q, have set-screwso o"-to pass through them, and these screws press against the flat side of these springs, and thus set them more orless close to, one another.

These spring-catches engage the barbed end of a steel projection on a lever, J, and hold-this leverup.

- When Q goesv to the right, the barbed end engages in the catch of springm'. .When Q goes tothe left,

the other side ot'the barbed end engages, with m".

Now, these two spring-catches are practically somade that one is a little below the other, and the lever Q, through these two catches, holds the barbed end,'first on the highest catch, and then when thelever Q moves,

the spring-catch detaches itself from the barbed-lend,

which. drops by reason of the weight of the lever J", but

it-catch'es instantly again on the lower spring-catch, andr'emains there until the lever Q moves back again, and then it drops oil", and the lever J falls upon the pin x, which projects from lever Q. d

Now, "the lever J carries a. strong, well-supported steel roller-K.

As long as the barbed end remains caught, either on m or m, the crank-arm G is pressed against the roller "K, but, as soon as thelever J drops to r, then the roller,

dropping with it, slides overthe face of G, and thus this crank-arm being liberated, flies around until it nearly performs its function inrelation'to the hammer Y.

Before it completes its revolution, however, it engages, through its projecting 'end, fig. 2, with the cam L, which is firmly fastened to lever J, and this cam is so shaped that the continued rotation of (3- draws up the lever J, so that the barbed end moves'into a position higher than its engagement with either of the adjustable spring-catches, and almost at the same instant that G strikes the roller K, which stops it, it slips ofl of the cam L, and thusallows the lever J to drop down gently into :an engagement, through its barbed end, m", according as the lever Q is to the with either in or right or to the left. Thus the crank-arm caught, and recoil and jar are prevented.

It is evident that, for some purposes, we may reverse the relation of these parts; cam A on the shaft F, lever J, we can lift the e is firmly and the lifting-arm B on the lever, to replace it as before.

The face of G, which strikes against and moves against and by placing (fig. 3) the the roller, must be shaped so as to correspond with the are of a, circle, described from the fulcrum U, of the lever J.

The movement of the lever J thus does not increase or diminish the pressure of G against the roller, 'tnd it follows th. t no increase of force applied to G will in-' fluence the friction of the barbedend upon the springcaltche's m What we claim, therefore, and desire to secure by Letters Patent, is-

1. ,The adjustable spring-catches arresting the detent, by means of which the delicacy of the trip is adjnsted, and the wear of the parts compensated for.

2. The combination of the lever Q with its ad ust-ae ble spring-hook, or hooks, the barbed (lctent, the lever "J, the roller K, the crank-arm G, the cum L, which, 

